Connect with us

Hi, what are you looking for?



River Severn Project Could Power 5% of UK Homes

Water rises and falls up to 12 yards, twice a day in the Severn Estuary. That’s a lot of potential tidal power going to waste, and the UK knows it. Yesterday, the government announced 5 potential schemes to harness the Severn’s plentiful energy.

The proposals are as follows: the Bridgewater-Bay lagoon (impounds a section of coastal estuary to generate 1.36GW), the Fleming lagoon (a similar scheme on the Welsh shore), the Cardiff-Weston barrage (ten-mile stretch of land that could generate up to 5% of the UK’s energy needs), the Shoots barrage (upstream scheme that could generate 1GW), and the Beachley barrage (scheme above the Wye River that could generate 625MW).

The lagoons would be built from stone, rubble, and 9 ft. high sausage-shaped bags filled with silt. The bags would create a 12 yard high lagoon wall. Each lagoon would theoretically fill with water twice a day, and power would be generated when water flowing out of the lagoons drives electricity-generating turbines.

According to project developers, a prototype lagoon could be built by 2012.

All of the proposed schemes have received environmentalist approval, with the exception of the Cardiff-Weston Barrage. The controversial dam would destroy thousands of acres of mudflats and salt marshes.

The UK government will pick a project by 2010 after a 2-year feasibility study looking into the costs, impact, and benefits of each scheme.

Photo CC licensed by flickr user Simon Pow

Appreciate CleanTechnica’s originality and cleantech news coverage? Consider becoming a CleanTechnica Member, Supporter, Technician, or Ambassador — or a patron on Patreon.

Don't want to miss a cleantech story? Sign up for daily news updates from CleanTechnica on email. Or follow us on Google News!

Have a tip for CleanTechnica, want to advertise, or want to suggest a guest for our CleanTech Talk podcast? Contact us here.
Written By

was formerly the editor of CleanTechnica and is a senior editor at Co.Exist. She has contributed to SF Weekly, Popular Science, Inhabitat, Greenbiz, NBC Bay Area, GOOD Magazine, and more. A graduate of Vassar College, she has previously worked in publishing, organic farming, documentary film, and newspaper journalism. Her interests include permaculture, hiking, skiing, music, relocalization, and cob (the building material). She currently resides in San Francisco, CA.


You May Also Like

Air Quality

London’s Ultra Low Emission Zone (ULEZ) will be expanded on 29 August 2023. It will operate London-wide across all London boroughs, up to the...

Clean Transport

There are over 59,000 EV charge point connectors in Britain at the moment, and the Competition and Markets Authority says the nation could need...

Clean Transport

London’s electrification journey still has a long way to go, but the UK’s capital is setting the pace in terms of charging infrastructure. Sadiq...


Harmony Energy Income Trust announced that it has brought Europe’s largest battery energy storage system (by MWh) online. The cost of turning off UK...

Copyright © 2022 CleanTechnica. The content produced by this site is for entertainment purposes only. Opinions and comments published on this site may not be sanctioned by and do not necessarily represent the views of CleanTechnica, its owners, sponsors, affiliates, or subsidiaries.